Hi! Welcome to the group. If you go to Rockler.com, they have a deal right now where you get their Adirondack chair plan free if you sign up for their email newsletter. You might have to click 'reload' a few times on your browser, because the chair plan is one of 3 or 4 ads that cycle through when the page loads (right-hand side of page). If you don't have experience with them yet, Rockler is a great woodworking supply company in general. I don't know if Rockler's plan is better than other free plans you can find on google, but I like to look at a few plans (if available) and take things I like from each one before carefully planning my final version of whatever I'm making. There is also a fairly detailed Adk chair plan at Popular Mechanics
formatting link
you can try searching google groups - a few recent threads suggest that Norm's adk chair plans are the most comfortable (that's Norm of New Yankee Workshop - check out the link in the post above), while Jake's chair isn't as comfortable or good looking. I haven't built any of these - I'm just passing along things I've seen recently while browsing. In my experience, the free plans you can find all over the web are usually not very detailed, not step by step, or maybe just "shop drawings". When you pay for plans, or download the "weekly special" or whatever from various woodworking catalogs or magazines, there are often more detailed cut lists, diagrams, and step-by-step photos and descriptions. Of course there are lots of exceptions both ways here. Hope this is helpful - good luck and have fun with your project, Andy